Sweep1 Error for Car Wheel Design

Hi,
I’m trying to build a car wheel and I’m trying to create spokes for the wheel by connecting lines between the inner and outer circles of the wheel then using sweep1 to generate a surface centered on the lines. For some reason, I’m getting an error for the sweep, and I’d really appreciate some help on this. I tried searching for posts that match my error but I haven’t had any luck. I’ve enclosed my .gh file for reference. I’m a beginner so forgive me if I don’t know something!

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car wheel.gh (11.6 KB)
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Try grafting the inputs of the sweep